CN104964343A - Device and method for improving running reliability of compressor - Google Patents
Device and method for improving running reliability of compressor Download PDFInfo
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- CN104964343A CN104964343A CN201510325175.4A CN201510325175A CN104964343A CN 104964343 A CN104964343 A CN 104964343A CN 201510325175 A CN201510325175 A CN 201510325175A CN 104964343 A CN104964343 A CN 104964343A
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- compressor
- heat exchanger
- discharge superheat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of air conditioner control, in particular to a device and method for improving running reliability of a compressor. The device comprises a controller, the compressor, a four-way valve, an outdoor air cooling heat exchanger, a first outdoor unit stop valve, a second outdoor unit stop valve, a first heat exchanger and a detection device. The detection device acquires the discharge superheat degree; the controller adjusts the opening degree of a flow adjusting valve connected with the first heat exchanger according to the discharge superheat degree, and therefore the flow of gaseous refrigerant entering the first heat exchanger is controlled, the superheat degree of return air is improved, and the discharge superheat degree of the gaseous refrigerant discharged out of the compressor is made to meet requirements. According to the device and method, the liquid/gaseous refrigerant flowing to the compressor can be heated, and the discharge superheat degree of the gaseous refrigerant discharged out of the compressor is made to meet the requirements, so that the stable discharge superheat degree of an air conditioner can be kept at any environment temperature; therefore, the long-time running stability and reliability of the air conditioner are enhanced.
Description
Technical field
The present invention relates to airconditioning control field, particularly a kind of apparatus and method improving compressor operating reliability.
Background technology
Along with the development of society, living standards of the people improve constantly, and air-conditioner uses has become in human lives the requirement improving office environment; Air-conditioner has been widely used in the different occasions such as family, hotel, dining room, office, factory building, machine room simultaneously.In use, because environment temperature is ever-changing, environment temperature has many times exceeded the range of operation of common air-conditioning, still needs air conditioner refrigerating (cryogenic refrigeration) when particularly low for temperature, or in the frosting of ultralow temperature air-conditioning heating off-premises station.Compressor is as the core component of air-conditioning system, it has higher requirement to the concentration of discharge superheat and refrigeration oil, and when cryogenic refrigeration, low-temperature heating need defrost and interior machine fault to make interior machine flow control valve normally control, a large amount of liquid refrigerants can be caused to be back to fluid reservoir and then to enter the situation of compressor, and then there is compressor liquid hammer and lubricating oil dilution, make compressor operating bad, cause compressor damage.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of apparatus and method improving compressor operating reliability, solve prior art under cryogenic refrigeration or low-temperature heating need the situations such as defrost, there will be discharge superheat deficiency thus cause liquid refrigerants reflux compressor to cause the technical problem of compressor damage.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of device improving compressor operating reliability, comprises controller, compressor, cross valve, outdoor air cooling heat exchanger, the first off-premises station stop valve, the second off-premises station stop valve, First Heat Exchanger and the checkout gear for gathering discharge superheat;
Described compressor comprises exhaust outlet and gas returning port;
Described cross valve comprises exhaust port D, condensation port C, evaporimeter port E and air intake duct port S, and described exhaust port D connects the exhaust outlet of described compressor by the first pipeline; Described air intake duct port S connects the gas returning port of described compressor;
Described outdoor air cooling heat exchanger arrival end connects described cross valve condensation port C, and the port of export connects described first off-premises station stop valve; Described outdoor air cooling heat exchanger is provided with outdoor fan;
Described First Heat Exchanger arrival end is connected to the arbitrary node between described exhaust outlet of compressor and described outdoor air cooling heat exchanger, and the port of export connects the suction port S of described cross valve by flow control valve;
The port of export of described second off-premises station stop valve connects the evaporimeter port E of described cross valve;
The output of described checkout gear connects the input of described controller, and described controller output end connects described flow control valve.
The invention has the beneficial effects as follows: the invention provides a kind of device improving compressor operating reliability, this device can heat by the liquid state/gaseous state low temperature refrigerant flowing to compressor, not only increase the degree of superheat of return-air, and the discharge superheat of the gaseous coolant entering compressor can be made to meet the demands, air-conditioner is made no matter to be in which kind of environment temperature, equal can maintenance, stablizes discharge superheat, thus strengthens stability and the reliability of air-conditioner longtime running.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described checkout gear comprises pressure sensor and temperature-detecting device, and described pressure sensor is all connected the input of described controller with the output of described temperature-detecting device; Described pressure sensor is arranged on described first pipeline, for gathering the pressure at expulsion of described compressor; Described temperature-detecting device is arranged on the exhaust ports near described compressor, for gathering described compressor exhaust temperature.
Further, described temperature-detecting device is temperature sensor or exhaust temperature-sensitive bag.
Further, described exhaust temperature-sensitive handbag is drawn together sleeve pipe and is plugged on the temperature-sensitive bag in described sleeve pipe, and described Socket welding is connected on the exhaust ports of described compressor, is provided with the silica gel for heat conduction between described temperature-sensitive bag and described sleeve pipe.
Further, also comprise reservoir, described reservoir arrival end connects described cross valve air intake duct port S, and the port of export connects the gas returning port of described compressor by described First Heat Exchanger.
Adopt the beneficial effect of above-mentioned further scheme: adopt reservoir gas coolant can be separated with liquid refrigerants, prevent liquid refrigerants from entering through the air inlet pipe of compressor, and cause the phenomenon of liquid refrigerants liquid hazards compressor, thus improve functional reliability.
Further, also comprise oil eliminator, described oil eliminator comprises arrival end, first port of export and second port of export, and described arrival end connects the exhaust outlet of described compressor, and described first port of export connects the exhaust port D of described cross valve by described first pipeline; Described second port of export is connected to the arbitrary node between the gas returning port of described compressor and described First Heat Exchanger arrival end by filter and capillary.
The beneficial effect of above-mentioned further scheme is adopted to be: to adopt oil eliminator oil the oil in compressor air-discharging can be separated, the oil inlet quantity of minimizing system, avoid the impact of oil on system heat transfer, can guarantee that lubricating oil turns back in the oil storage tank of compressor simultaneously, prevent compressor from causing fault due to the shortage of lubricating oil, extend all life-spans of compressor.
Further, described First Heat Exchanger arrival end is connected between described exhaust outlet of compressor and described cross valve exhaust port D;
Or described First Heat Exchanger arrival end is connected between described cross valve condensation port C and described outdoor air cooling heat exchanger;
Or described First Heat Exchanger arrival end is connected between described exhaust outlet of compressor and oil eliminator arrival end;
Or described First Heat Exchanger arrival end is connected between described oil eliminator first port of export and described cross valve exhaust port D.
Further, the described First Heat Exchanger port of export is connected between described reservoir arrival end and described cross valve air intake duct port S by flow control valve.
Further, electronic throttle parts are provided with between the described outdoor air cooling heat exchanger port of export and described first off-premises station stop valve; Described electronic throttle parts are capillary, electric expansion valve or heating power expansion valve.
The beneficial effect of above-mentioned further scheme is adopted to be: capillary or electric expansion valve or heating power expansion valve all have good throttling action, wherein, the aperture of electric expansion valve and heating power expansion valve can degree of supercooling as required control, and the production cost of capillary low, assemble simple and convenient.
Further, described First Heat Exchanger is plate type heat exchanger, inside and outside fin heat exchanger or convergent-divergent pipe heat exchanger.For the heat exchange of gas-gas, all concrete technique effect preferably of above-mentioned three kinds of heat exchangers.
Improve a method for compressor operating reliability, described method utilizes above-described device, said method comprising the steps of:
Step 1, after heat pump type air conditioning system compressor starts is run, described checkout gear detects pressure at expulsion P when running
c, and find described pressure at expulsion P according to pressure-saturation temperature correspondence table
ccorresponding saturation temperature T
b;
Step 2, described checkout gear detects delivery temperature T
c;
Step 3, by described saturation temperature T
bwith described delivery temperature T
ccontrast, calculates current discharge superheat T
dsh=T
c-T
b;
Step 4, the size of more described discharge superheat and preset value, and the open and-shut mode controlling described flow control valve according to judged result.
Further, described step 4 is specially:
Step 401, judges described discharge superheat T
dshwhether being not less than the first preset value, if so, then keeping flow control valve for shutting state, until described discharge superheat T detected
dshbe less than described first preset value, described flow control valve is opened into initial opening a;
At interval of 1min, duplicate detection discharge superheat T
dshif, discharge superheat T
dshstill be less than described first preset value, then continue out large discharge control valve, open large aperture b at every turn, until open to maximum or be checked through discharge superheat T
dshbe not less than described first preset value;
At interval of 1min, discharge superheat T described in duplicate detection
dsh, as described discharge superheat T
dshafter the second preset value, adjust flux control valve closes step number b, until shut completely or discharge superheat T every 30S
dshlower than the second preset value.
Further, described first preset value is 15 DEG C, and the second preset value is 20 DEG C.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present embodiment 1 one kinds improves the device of compressor operating reliability;
Fig. 2 is the schematic flow sheet that the present embodiment 1 one kinds improves the method for compressor operating reliability;
Fig. 3 is the structural representation that the present embodiment 2 one kinds improves the device of compressor operating reliability;
Fig. 4 is the structural representation that the present embodiment 3 one kinds improves the device of compressor operating reliability;
Fig. 5 is the structural representation that the present embodiment 4 one kinds improves the device of compressor operating reliability;
In accompanying drawing, the list of parts representated by each label is as follows:
11, compressor, 12, oil eliminator, 13, cross valve, 14, pressure sensor, 15, outdoor air cooling heat exchanger, 16, electronic throttle parts, 17, flow control valve, 18, First Heat Exchanger, 19 fluid reservoirs, 20, temperature-detecting device, 21, the first off-premises station stop valve, the 22, second off-premises station stop valve, the 23, first pipeline.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, improve the structural representation of the device of compressor operating reliability for the present invention is a kind of, comprise controller (not shown in FIG.), compressor 11, cross valve 13, outdoor air cooling heat exchanger 15, first off-premises station stop valve 21, second off-premises station stop valve 22, First Heat Exchanger 18 and checkout gear; Described compressor 11 comprises exhaust outlet and gas returning port; Described cross valve 13 comprises exhaust port D, condensation port C, evaporimeter port E and air intake duct port S, and described exhaust port D connects the exhaust outlet of described compressor 11 by the first pipeline 23; Described air intake duct port S connects the gas returning port of described compressor 11; Described outdoor air cooling heat exchanger 15 arrival end connects described cross valve 13 condensation port C, and the port of export connects described first off-premises station stop valve 21; Described outdoor air cooling heat exchanger 15 is provided with outdoor fan; The port of export of described second off-premises station stop valve 22 connects the evaporimeter port E of described cross valve 13; The output of described checkout gear connects the input of described controller, and described controller output end connects described flow control valve 17, and described checkout gear is for gathering discharge superheat.
In the present embodiment, described checkout gear comprises pressure sensor 14 and temperature-detecting device 20, and described pressure sensor 14 is all connected the input of described controller with the output of described temperature-detecting device 20; Described pressure sensor 14 is arranged on described first pipeline 23, for gathering the pressure at expulsion of described compressor 11; Described temperature-detecting device 20 is arranged on the exhaust ports near described compressor 11, for gathering described compressor 11 delivery temperature.After pressure sensor detects 14 to pressure at expulsion Pc during air-conditioning system operation, find corresponding saturation temperature Tb by pressure-saturation temperature correspondence table; Simultaneous temperature checkout gear 20 detects delivery temperature Tc, can calculate current discharge superheat Tdsh=Tc-Tb.In other embodiments, also by other modes, such as account form obtains discharge superheat, and these modes are all within protection scope of the present invention.Preferably, described temperature-detecting device 20 can be temperature sensor, described temperature sensor is thermistor, thermistor has the advantages such as volume is little, highly sensitive, good stability, easily machine-shaping, use thermistor to detect delivery temperature Tb as temperature sensor, effectively can ensure the accuracy of testing result.In other embodiments, described temperature-detecting device 20 can also be exhaust temperature-sensitive bag, described exhaust temperature-sensitive handbag is drawn together sleeve pipe and is plugged on the temperature-sensitive bag in described sleeve pipe, described Socket welding is connected on the exhaust ports of described compressor 11, is provided with the silica gel for heat conduction between described temperature-sensitive bag and described sleeve pipe.
Preferably, also comprise reservoir 19 and oil eliminator 12 in the present embodiment, described reservoir 19 arrival end connects described cross valve 13 air intake duct port S, and the port of export connects the gas returning port of described compressor 11 by described First Heat Exchanger 18.In the present embodiment, adopt reservoir gas coolant can be separated with liquid refrigerants, prevent liquid refrigerants from entering through the air inlet pipe of compressor, and cause the phenomenon of liquid refrigerants liquid hazards compressor, thus improve functional reliability.In the present embodiment, described oil eliminator 12 comprises arrival end, first port of export and second port of export, and described arrival end connects the exhaust outlet of described compressor 11, and described first port of export connects the exhaust port D of described cross valve 13 by described first pipeline 23; Described second port of export is connected to the arbitrary node between the gas returning port of described compressor 11 and described First Heat Exchanger 18 arrival end by filter and capillary.Adopt oil eliminator oil the oil in compressor air-discharging can be separated, the oil inlet quantity of minimizing system, avoid the impact of oil on system heat transfer, can guarantee that lubricating oil turns back in the oil storage tank of compressor simultaneously, prevent compressor from causing fault due to the shortage of lubricating oil, extend all life-spans of compressor.
Described First Heat Exchanger 18 arrival end is connected to the arbitrary node between described compressor 11 exhaust outlet and described outdoor air cooling heat exchanger 15, and the port of export connects the suction port S of described cross valve 13 by flow control valve 17.According to the difference of structure, described First Heat Exchanger 18 there is multiple syndeton.Do not have oil eliminator in embodiment 2, described First Heat Exchanger 18 arrival end is connected between described compressor 11 exhaust outlet and described cross valve 13 exhaust port D, as shown in Figure 3; In embodiment 3, described First Heat Exchanger 18 arrival end is connected between described cross valve 13 condensation port C and described outdoor air cooling heat exchanger 15, as shown in Figure 4.Be provided with oil eliminator 12 in embodiment 4, described First Heat Exchanger 18 arrival end is connected between described compressor 11 exhaust outlet and oil eliminator 12 arrival end, as shown in Figure 5; And in the present embodiment 1, described First Heat Exchanger 18 arrival end is connected between described oil eliminator 12 first port of export and described cross valve 13 exhaust port D, as shown in Figure 1.In the present embodiment, described First Heat Exchanger 18 port of export is connected between described reservoir 19 arrival end and described cross valve 13 air intake duct port S by flow control valve 17, as shown in Figure 1.Described flow control valve 17 is capillary, electric expansion valve or heating power expansion valve.
Preferably, in the present embodiment, between described outdoor air cooling heat exchanger 15 port of export and described first off-premises station stop valve 21, be provided with electronic throttle parts 16; Described electronic throttle parts 16 are capillary, electric expansion valve or heating power expansion valve.Capillary or electric expansion valve or heating power expansion valve all have good throttling action, and wherein, the aperture of electric expansion valve and heating power expansion valve can degree of supercooling as required control, and the production cost of capillary low, assemble simple and convenient.
Preferably, First Heat Exchanger 18 described in the present embodiment is any one of plate type heat exchanger, inside and outside fin heat exchanger or convergent-divergent pipe heat exchanger.Described plate type heat exchanger, inside and outside fin heat exchanger or convergent-divergent pipe heat exchanger all can realize the heat exchange of high-temperature gas and cryogenic gas, and have good heat transfer effect.
Principle of the present invention is as follows: gaseous coolant becomes the gaseous coolant of HTHP through compressor 11 acting, the gaseous coolant of HTHP is after oil eliminator 12, cross valve 13, condensation in outdoor air cooling heat exchanger 15, and evaporation in indoor air cooling heat exchanger (not shown in FIG.) after electronic throttle parts 16 throttling, become gaseous coolant or the liquid refrigerants of low-temp low-pressure, the gaseous coolant of low-temp low-pressure or liquid refrigerants get back to compressor 11 after the second off-premises station stop valve 22, cross valve 13, fluid reservoir 19.Add First Heat Exchanger 18 and flow control valve 17 in the present invention, the part high pressure gaseous refrigerant formed through compressor 11 acting enters First Heat Exchanger 18 after oil eliminator; The low-temp low-pressure gaseous coolant simultaneously formed through the evaporation of indoor air cooling heat exchanger or liquid refrigerants also enter First Heat Exchanger 18, and being carried out adding by described high pressure gaseous refrigerant the gaseous coolant that the thermosetting degree of superheat meets the demands, described gaseous coolant gets back to compressor 11 after cross valve 13, fluid reservoir 19.By increasing First Heat Exchanger, the low temperature liquid refrigerant or gaseous coolant heating that flow to compressor 11 can be become euthermic gaseous coolant; Simultaneously, flow control valve and controller is provided with in the present invention, the cold medium flux entering First Heat Exchanger is controlled by the opening degree of controller control flow check control valve, thus the discharge superheat controlling compressor meets the safe degree of superheat requirement of compressor, ensure that compressor can run safely and reliably in various environment.
As shown in Figure 2, improve the schematic flow sheet of the method for compressor operating reliability for the present invention is a kind of, comprise the following steps:
Step 1, after heat pump type air conditioning system compressor starts is run, described checkout gear detects pressure at expulsion P when running
c, and find described pressure at expulsion P according to pressure-saturation temperature correspondence table
ccorresponding saturation temperature T
b; In the present embodiment, pressure at expulsion P when adopting pressure sensor 14 detection to run
c;
Step 2, described checkout gear detects delivery temperature T
c; In the present embodiment, temperature-detecting device 20 is adopted to detect delivery temperature T
c;
Step 3, by described saturation temperature T
bwith described delivery temperature T
ccontrast, calculates current discharge superheat T
dsh=T
c-T
b;
Step 4, the size of more described discharge superheat and preset value, and the open and-shut mode controlling described flow control valve 17 according to judged result.
In the present embodiment, described step 4 is specially:
Step 401, judges described discharge superheat T
dshwhether being not less than the first preset value, if so, then keeping flow control valve 17 for shutting state, until described discharge superheat T detected
dshbe less than described first preset value, described flow control valve 17 is opened into initial opening a;
At interval of 1min, duplicate detection discharge superheat T
dshif, discharge superheat T
dshstill be less than described first preset value, then continue out large discharge control valve 17, open large aperture b at every turn, until open to maximum or be checked through discharge superheat T
dshbe not less than described first preset value;
At interval of 1min, discharge superheat T described in duplicate detection
dsh, as described discharge superheat T
dshafter the second preset value, adjust flux control valve 17 closes step number b, until shut completely or discharge superheat T every 30S
dshlower than the second preset value.
In the present embodiment, described first preset value is 15 DEG C, and the second preset value is 20 DEG C.15 DEG C, 20 DEG C and initial opening a, aperture b equivalence in above-described embodiment, can modify according to actual conditions in other specific embodiment, these amendments all drop within protection scope of the present invention.
The invention provides a kind of device improving compressor operating reliability, this device can heat by the liquid state/gaseous state low temperature refrigerant flowing to compressor, improve the return-air degree of superheat, and then the discharge superheat of the gaseous coolant of discharge compressor is met the demands, air-conditioner is made no matter to be in which kind of environment temperature, equal can maintenance, stablizes discharge superheat, thus strengthens stability and the reliability of air-conditioner longtime running.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. improving a device for compressor operating reliability, it is characterized in that: comprising controller, compressor (11), cross valve (13), outdoor air cooling heat exchanger (15), the first off-premises station stop valve (21), the second off-premises station stop valve (22), First Heat Exchanger (18) and the checkout gear for gathering discharge superheat;
Described compressor (11) comprises exhaust outlet and gas returning port;
Described cross valve (13) comprises exhaust port D, condensation port C, evaporimeter port E and air intake duct port S, and described exhaust port D connects the exhaust outlet of described compressor (11) by the first pipeline (23); Described air intake duct port S connects the gas returning port of described compressor (11);
Described outdoor air cooling heat exchanger (15) arrival end connects described cross valve (13) condensation port C, and the port of export connects described first off-premises station stop valve (21); Described outdoor air cooling heat exchanger (15) is provided with outdoor fan;
Described First Heat Exchanger (18) arrival end is connected to the arbitrary node between described compressor (11) exhaust outlet and described outdoor air cooling heat exchanger (15), and the port of export connects the suction port S of described cross valve (13) by flow control valve (17);
The port of export of described second off-premises station stop valve (22) connects the evaporimeter port E of described cross valve (13);
The output of described checkout gear connects the input of described controller, and described controller output end connects described flow control valve (17).
2. the device of raising compressor operating reliability according to claim 1, it is characterized in that: described checkout gear comprises pressure sensor (14) and temperature-detecting device (20), and described pressure sensor (14) is all connected the input of described controller with the output of described temperature-detecting device (20); Described pressure sensor (14) is arranged on described first pipeline (23), for gathering the pressure at expulsion of described compressor (11); Described temperature-detecting device (20) is arranged on the exhaust ports near described compressor (11), for gathering described compressor (11) delivery temperature.
3. the device of raising compressor operating reliability according to claim 2, is characterized in that: described First Heat Exchanger (18) is plate type heat exchanger, inside and outside fin heat exchanger or convergent-divergent pipe heat exchanger; Described temperature-detecting device (20) is temperature sensor or exhaust temperature-sensitive bag.
4. according to the device of the arbitrary described raising compressor operating reliability of claims 1 to 3, it is characterized in that: also comprise reservoir (19), described reservoir (19) arrival end connects described cross valve (13) air intake duct port S, and the port of export connects the gas returning port of described compressor (11) by described First Heat Exchanger (18).
5. the device of raising compressor operating reliability according to claim 4, it is characterized in that: also comprise oil eliminator (12), described oil eliminator (12) comprises arrival end, first port of export and second port of export, described arrival end connects the exhaust outlet of described compressor (11), and described first port of export connects the exhaust port D of described cross valve (13) by described first pipeline (23); Described second port of export is connected to the arbitrary node between the gas returning port of described compressor (11) and described First Heat Exchanger (18) arrival end by filter and capillary.
6. the device of raising compressor operating reliability according to claim 5, is characterized in that: described First Heat Exchanger (18) arrival end is connected between described compressor (11) exhaust outlet and described cross valve (13) exhaust port D;
Or described First Heat Exchanger (18) arrival end is connected between described cross valve (13) condensation port C and described outdoor air cooling heat exchanger (15);
Or described First Heat Exchanger (18) arrival end is connected between described compressor (11) exhaust outlet and oil eliminator (12) arrival end;
Or described First Heat Exchanger (18) arrival end is connected between described oil eliminator (12) first port of export and described cross valve (13) exhaust port D.
7. the device of raising compressor operating reliability according to claim 5, is characterized in that: be provided with electronic throttle parts (16) between described outdoor air cooling heat exchanger (15) port of export and described first off-premises station stop valve (21); Described electronic throttle parts (16) are capillary, electric expansion valve or heating power expansion valve.
8. improve a method for compressor operating reliability, described method utilizes the arbitrary described device of claim 1 ~ 7, said method comprising the steps of:
Step 1, after heat pump type air conditioning system compressor starts is run, described checkout gear detects pressure at expulsion P when running
c, and find described pressure at expulsion P according to pressure-saturation temperature correspondence table
ccorresponding saturation temperature T
b;
Step 2, described checkout gear detects delivery temperature T
c;
Step 3, by described saturation temperature T
bwith described delivery temperature T
ccontrast, calculates current discharge superheat T
dsh=T
c-T
b;
Step 4, the size of more described discharge superheat and preset value, and the open and-shut mode controlling described flow control valve (17) according to judged result.
9. method according to claim 8, is characterized in that, described step 4 is specially:
Step 401, judges described discharge superheat T
dshwhether being not less than the first preset value, if so, then keeping flow control valve (17) for shutting state, until described discharge superheat T detected
dshbe less than described first preset value, described flow control valve (17) is opened into initial opening a;
At interval of 1min, duplicate detection discharge superheat T
dshif, discharge superheat T
dshstill be less than described first preset value, then continue out large described flow control valve (17), open large aperture b at every turn, until open to maximum or be checked through discharge superheat T
dshbe not less than described first preset value;
At interval of 1min, discharge superheat T described in duplicate detection
dsh, as described discharge superheat T
dshafter the second preset value, adjust flux control valve (17) closes step number b, until shut completely or discharge superheat T every 30S
dshlower than described second preset value.
10. method according to claim 9, is characterized in that: described first preset value is 15 DEG C, and the second preset value is 20 DEG C.
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